From: Jaroslav Kysela <perex@perex.cz>
Date: Thu, 13 May 2021 08:59:43 +0000 (+0200)
Subject: conf: add snd_config_is_empty() function
X-Git-Tag: v1.2.5~24
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=3050af4b90ff6ecf41c931164ab3010b5d248a91;p=alsa-lib.git

conf: add snd_config_is_empty() function

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---

diff --git a/include/conf.h b/include/conf.h
index e729fb05..5c70ebcc 100644
--- a/include/conf.h
+++ b/include/conf.h
@@ -141,6 +141,7 @@ int snd_config_imake_pointer(snd_config_t **config, const char *key, const void
 
 snd_config_type_t snd_config_get_type(const snd_config_t *config);
 int snd_config_is_array(const snd_config_t *config);
+int snd_config_is_empty(const snd_config_t *config);
 
 int snd_config_set_id(snd_config_t *config, const char *id);
 int snd_config_set_integer(snd_config_t *config, long value);
diff --git a/src/conf.c b/src/conf.c
index 72422f12..7ebf7577 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -1832,6 +1832,19 @@ int snd_config_is_array(const snd_config_t *config)
 	return 1;
 }
 
+/**
+ * \brief Returns if the compound has no fields (is empty).
+ * \param config Handle to the configuration node.
+ * \return A positive value when true, zero when false, otherwise a negative error code.
+ */
+int snd_config_is_empty(const snd_config_t *config)
+{
+	assert(config);
+	if (config->type != SND_CONFIG_TYPE_COMPOUND)
+		return -EINVAL;
+	return list_empty(&config->u.compound.fields);
+}
+
 /**
  * \brief Returns the id of a configuration node.
  * \param[in] config Handle to the configuration node.